Description

This article explains a scenario where High rtinfo CPU will be seen on Junos under 'show system processes extensive'

 

Symptoms

High rtinfo CPU will be seen under 'show system processes extensive'

router_name# run show system processes extensive | except 0.00
last pid: 72589; load averages: 1.30, 1.69, 1.48 up 5+11:28:36 22:40:18
356 processes: 6 running, 323 sleeping, 1 zombie, 26 waiting

Mem: 591M Active, 6184M Inact, 1854M Wired, 521M Buf, 7266M Free
Swap: 8192M Total, 8192M Free


PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU COMMAND
72569 root 100 0 95316K 4528K CPU2 2 0:23 97.66% rtinfo

Solution

Whenever 'show route forwarding-table' is run via CLI, the rtinfo process spike is seen and this process is responsible for getting the route info from the Kernel.

rtinfo CPU will spiking consistently if this command is running in a script script in the background polling 'show route forwarding-table' back to back (without delay in between subsequent polling)

Modification History

2024-04-23 : Article Created